GemmartUSA Tourmaline Chip Beads Natural Stone Beads 1 Strand 34 Inch Jewelry Making Supplies (CHMT-70001) -1 strand of 34". Beads vary in size from 4mm-6mm. - Natural chip beads for DIY, Jewelry Making and Crafts - Material:Semiprecious Stone;Shape:Freefrom,Irregular;Style:Drilled - Beads temporarily strung together. Use single beads or restring - Comes with a signed Certificate of Authenticity from GemMartUSAInc